Originally Posted By: mcyr
This post was automatically imported from our archived forum.
Railings as you asked, I am assuming that you are talking about guard rails. Those that are on a level surface. Residential requires at least 36" and Commercial has to be 42" in height.
Wall rails are allowable from 34" to 38" Commercial or Residential.
As David explained, any surface above grade 30" or more shall require a railing and three risers or more shall require a hand rail.
Correct me if I am wrong, but I also believe if the stairs are 4' or wider, two handrails are required.
Handrail diameter shall be no more than 2" in diameter and will be at least 2 1/2"s from the wall to the centerline of the rail.
Hope this helps.